Research/Patents/US 4396894
US 4396894Tier 1 — UAP Program Assignee

DIGITAL NOISE GENERATING APPARATUS

Assignee

Northrop

Filed as: NORTHROP GRUMMAN CORPORATION

Filed

Oct 25, 1977

Granted

Aug 2, 1983

Location

1840 CENTURY PARK EAST, LOS ANGELES CALIFORNIA 90067

Abstract

A digital noise generator, wherein pseudo-random rapidly changing analog input voltages to a voltage controlled oscillator are used to generate corresponding rapidly changing discrete frequency outputs, is disclosed. Means are provided to delay the oscillator output by an amount at least equal to the rise time between each frequency change. The delayed and non-delayed oscillator outputs are electrically coupled through a switch that operates at times and at a rate to eliminate the rise time between frequency changes and thus improve the frequency spectrum.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Jan 29, 1982

Rescinded

Feb 7, 1983

Duration

1 year

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records